import unittest
from ddt import ddt, data, unpack
#import ddt

@ddt
class MyTestCase(unittest.TestCase):
    @data((1, 2), (3, 6), (4, 8))
    @unpack
    def test_example(self, input_data, expected_result):
        result = input_data * 2
        self.assertEqual(result, expected_result)

if __name__ == '__main__':
    unittest.main()